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The domestic batik industry produces liquid waste which is generally not carried out properly so that the waste contaminates the waterbody. The heavy metals content in the batik industry liquid waste is lead (Pb). Fecoremediation using Skeletonema costatum microalgae is one solution to reduce Pb levels. The research experiment used RAL (complete randomized design) with three repetitions over 7 days of treatment with variations in inoculum density in the form of V1 (control, without microalgae), V2 (inoculum density 2x10 cell/ml), V3 (inoculum density 4x10 cell/ml) and V4 (inoculum density 6x10 cell/ml). The results showed that V4 treatment was the most effective in reducing Pb levels in batik waste with a decrease in percentage of 36.453% and decreasing BOD levels in batik waste with a decrease percentage of 81.006%.

Potensi Skeletonema costatum (Greville) sebagai Fikoremediator Logam Berat Timbal (Pb) Limbah Batik